When Alter Ego impersonates Mondo to try to help Kiyotaka, he adopts the persona of "Kiyondo" and becomes more aggressive as well as very protective of Alter Ego, he acts more like mondo and is more aggressive and violent towards others than his usual self but he never properly swears. Hifumi has a verbose manner of speaking, often going on long-winded tangents about his interests such as anime or fanfiction. He also has a tendency to casually make creepy or perverted comments to women often.